Anticlimbing device for towers



June 27, 1933. N, B, OBBARD 1,915,752

\NTICLIMBING DEVICE FOR TOWERS Filed Aug. 28, 1931 Imenfor:

Woe/7am 5. 055/480,

Patented June 27, 1933 UNITED STATES PATENT OFFICE NORMAN B. OBBARD,O]?v PITTSBURGH, PENNSYLVANIA ANTICLIMBING DEVICE FOR TOWERS Applicationfiled August 28,1931. Serial No. 590,021.

away from and toward the other. Fence,

wire is stretched between the inwardly extending arms and from theadjacently positioned pair of arms to'eac'h of the other outwardlyextending arms, so that by swinging the swinging arm a portion of thewire may be slacked to permit passage through the guard of a repairman.i In the drawing: t

Figure 1 is a top plan view of anexample of tliis'invention as itappears applied to a power transmission tower, the tower being shown incross-section; I v Figure 2 is a side view of Figure l.

Having referenceto the drawing, there is shown a tower 2 of the typeordinarily used for carrying high tension electric power transmissionlines. A plurality of inwardly extending angle iron arms 8 are bolted toeach leg of this tower 2, these arms being notched so that barbed wireat may be stretched between them nd securely positioned by being loopedabou' each arm in these notches.- A

plurality of outwardly extending angle iron arms 5 are also bolted ontothe tower2 and are likewise notched. Two of these arms 5 are adj acentlypositioned, one of these being fixed and the other mounted on a hingingbolt 6 for swinging movement, as is indicated by dotted lines and arrowsin Figure 1.

Barbed wire 4 is stretched between each of these outwardly extendingarms 5 from the two adjacently positioned arms, the wire also being inthis instance looped about each arm at its notched part so as to besecurely fixed in position. The two adjacently positioned arms areapertured so that a pad lock 7 may be used to lock them together.

The above construction adequately preyents climbing of the towers 2 byunauthorlzed persona-yet when the pad lock 7 is removed and theswingable arm is swung away from the adjacently positioned fixed arm aportion of the barbed wire is slacked sufii- 5 ciently to permit aworkman to climb through the guard and ascend to the top of the tower.

In the example shown the arms 3 and 5 are in each instance oppositelypositioned on the tower legs so that they may be fixed thereto by acommon bolt 8, thereby saving time and HIODQIY.

In order that the swingable arm may be accommodated to any size towerleg its hinge part is provided with a. slot 9 instead of a round hole.Although a specific form of this invention ias been shown in accordancewith the patent statutes it is not intendedvto limit the scope oft-hisinvention exactly thereto, except as is defined the appended claims.

I claim 1. In combination with a power transmission tower, a pluralityof extending arms positioned on said tower at spaced intervals, a pairof extending adjacent arms positioned on said tower between two of saidfirst named arms and in a plane therewith, one of these adj acent armsbeing arranged for swinging movement away from and towards the other andin a plane therewith, and fence wire stretched between said adjacentarms and said first named arms.

2. In combination with a power transmission tow-er, a plurality ofinwardly extending arms, a plurality of outwardly extending arms, two ofthese arms being adjacently positioned and the others being positionedat spaced intervals therefrom on said tower, one or the two adj acentlypositioned arms being arranged for swinging movement away a fromandtowards the other and in a plane therewith, means for locking saidtworadja cently positioned arms together and fence my hand.

NORMAN B. OBBARD.

wire stretched from and fixed to said two

